package com.example.blog.config;

import com.example.blog.common.AppVariable;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 用户拦截器
 */
public class LoginIntercept implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 获取session
        HttpSession session = request.getSession(false);
        // 如果session不为空且session中有用户信息
        if (session!= null && session.getAttribute(AppVariable.SESSION_USERINFO_KEY)!= null) {
            // 用户已登录
            return true;
        }
        // 登录页面
        response.sendRedirect("/login.html");
        return false;
    }
}